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Article
Open AccessSystematic underestimation of polycyclic aromatic hydrocarbon aqueous concentrations in rivers
Polycyclic aromatic hydrocarbons (PAHs) are a widespread group of organic contaminants whose presence in water bodies is cause of severe concern. With few exceptions, the majority of PAHs is hydrophobic, prese...
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Article
Open AccessA harmonized Danube basin-wide multi-compartment concentration database to support inventories of micropollutant emissions to surface waters
The European Water Framework Directive foresees the establishment of emission inventories for micropollutants (MP) to facilitate an evidence-based development of mitigation measures. Regionalized pathway analy...
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Article
Thiol-functionalized copolymeric polyesters by lipase-catalyzed esterification and transesterification of 1,12-dodecanedioic acid and its diethyl ester, respectively, with 1-thioglycerol
Copolymeric polyoxoesters containing branched-chain methylenethiol functions, i.e., poly(1,12-dodecanedioic acid-co-1-thioglycerol) and poly(diethyl 1,12-dodecanedioate-co-1-thioglycerol), were formed by lipase-c...
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Article
Simultaneous derivatization of acyl and S-alkyl moieties of acyl thioesters by using trimethylsulfonium hydroxide for gas chromatographic analysis
The reaction of long-chain acyl thioesters, viz. lauric acid dodecyl thioester, 1,8-di-S-palmitoyl octanedithiol, and tristearoyl α-monothioglycerol, with trimethylsulfonium hydroxide in the presence of methanol ...
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Article
Solvent-free lipase-catalyzed thioesterification and transthioesterification of fatty acids and fatty acid esters with alkanethiols in Vacuo
Palmitic acid hexadecylthioester and other long-chain acyl thioesters have been prepared in high yield (80–85%, purity >98%) by solvent-free lipase-catalyzed thioesterification of fatty acids with alkanethiols in...
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Article
S-methyl derivatives from thiol compounds by the pyrolytic reaction with trimethylsulfonium hydroxide
Base-catalyzed transesterification of acyl lipids with methanol in the presence of trimethylsulfonium hydroxide (TMSH) is an easy and convenient method for the preparation of fatty acid methyl esters for gas c...
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Article
Reaction of lipids containing hydroxy groups with trimethylsulfonium hydroxide: Formation ofO-methyl derivatives
Base-catalyzed transesterification of acyl lipids with trimethylsulfonium hydroxide (TMSH) is an easy and convenient method for the preparation of fatty acid methyl esters (FAME) for gas chromatography (GC) an...
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Article
Analysis of hydroxylated fatty acids from plant oils
A novel process has been described recently for the preparation of hydroxylated fatty acids (HOFA) and HOFA methyl esters from plant oils. HOFA methyl esters prepared from conventional and alternative plant oi...
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Article
Metabolism of long-chain fatty acids, alcohols and alkylglycerols in the fish parasiteParatenuisentis ambiguus (Acanthocephala)
Specific differences between the acyl composition of lipids on the helminthParatenuisentis ambiguus and its host eel, as shown previously, prompted us to study the lipid metabolism in this intestinal fish parasit...
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Article
Sterol and fatty acid composition of neutral lipids ofParatenuisentis ambiguus and its host eel
The sterol composition of free sterol and steryl ester fractions of the fish parasiteParatenuisentis ambiguus was determined. In addition, the fatty acid composition of various neutral lipid classes, i.e., wax es...
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Article
Formation of trierucoylglycerol (trierucin) from 1,2-Dierucoylglycerol by a homogenate of microspore-derived embryos ofBrassica napus L
Homogenates of microspore-derived embryos of rape (Brassica napus L.) incubated with [1-14C]erucoyl-CoA and 1,2-dierucoylglycerol are able to assemble trierucoyl-glycerol (trierucin). In addition, radioactive tri...
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Chapter
Biosynthesis of storage lipids in plant cell and embryo cultures
The biosynthesis of storage lipids in plant cell and embryo cultures is discussed in the light of their significance in the breeding of agriculturally important oil seed crops. After a short introduction to th...
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Article
Biotransformation of alkylglycerols in plant cell cultures: Production of platelet activating factor and other biologically active ether lipids
Plant cells in culture are capable of incorporating exogenous 1-O-alkyl-sn-glycerols into various neutral and ionic ether lipids. 1-O-Alkyl-2-acyl-sn-glycerol-3-phosphocholines, the major class of compounds thus ...
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Article
Nachweis der Raffination/Bleichung von Fetten und Ölen
Disteryl ethers are formed in low concentration (a few mg/kg) by dehydration of sterols during the conventional bleaching of fats and oils with acid-activated bleaching earths. A gas Chromatographie method for...
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Article
3-Chlorosteroids in protein hydrolyzates Determination by reversed-phase HPLC
Für die qualitative und quantitative Analyse von 3-Chlorosteroiden in Proteinhydrolysaten wurde eine Methode entwickelt. Mit Hilfe der Umkehrphasen-HPLC wurde nachgewiesen, daß verschiedene kommerzielle Protei...
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Article
Storage-protein regulation and lipid accumulation in microspore embryos of Brassica napus L.
Embryos derived in vitro from isolated microspores of Brassica napus L. were compared with their zygotic counterparts. Parameters investigated included storage-protein accumulation and gene expression, fattyacid ...
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Chapter
Biosynthesis of Triacylglycerols in Plant Cell and Embryo Cultures Their Significance in the Breeding of Oil Plants
Vegetable oils containing a mixture of triacylglycerols are of high value in human nutrition. Economically valuable fats and oils for the preparation of oleochemicals, however, require a more uniform compositi...
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Article
Metabolism of sitosteryl β-D-glucoside and its nutritional effects in rats
[4-14C]Sitosteryl β-D-glucoside, intragastrically administered to rats, was not absorbed by the intestinal mucosa. At three hr after the application, radioactivity was concentrated almost exclusively in the diges...
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Article
Analysis of disteryl ethers
Disteryl ethers isolated from a vegetable oil and a table margarine were analyzed by capillary gas chromatography. The composition of disteryl ethers in such products reveals whether vegetable oils are mixed w...
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Article
Biosynthesis and biotransformation of ether lipids
Some naturally occurring as well as synthetic ether lipids are biologically active. In certain cases, the effects of these substances are enhanced, in others, they are inhibited by compounds that were isolated...
